| Parameter |
Value |
| Designation |
P/2022 R5 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-05-27T20:48:27.054720Z |
| Orbit solution date (soln_date, UTC) |
2022-11-29T21:43:49Z |
| Obs used |
47 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-08T14:25:00.393600Z |
| Discovery magnitude (MPC) |
21.35 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-13.0000000 |
| e |
0.19578965 |
| q (au) |
2.469627 |
| a (au) |
3.070872 |
| i (deg) |
15.291928 |
| Ω (om, deg) |
115.067048 |
| ω (w, deg) |
240.680778 |
| M (ma, deg) |
25.299334 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.907 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.907 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.559 |
| k |
0.800 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
15:43:34.84 |
-07:13:40.5 |
HIP 76916 |
32.08 |
| 2026-07-29 12:00 |
15:43:39.48 |
-07:17:03.7 |
HIP 76916 |
30.15 |
| 2026-07-30 00:00 |
15:43:44.44 |
-07:20:27.5 |
HIP 76916 |
28.59 |
| 2026-07-30 12:00 |
15:43:49.70 |
-07:23:52.0 |
HIP 76916 |
27.48 |
| 2026-07-31 00:00 |
15:43:55.28 |
-07:27:17.2 |
HIP 76916 |
26.89 |
| 2026-07-31 12:00 |
15:44:01.16 |
-07:30:43.0 |
HIP 76916 |
26.86 |
| 2026-08-01 00:00 |
15:44:07.36 |
-07:34:09.4 |
HIP 76916 |
27.42 |
| 2026-08-01 12:00 |
15:44:13.86 |
-07:37:36.5 |
HIP 77097 |
25.98 |
| 2026-08-02 00:00 |
15:44:20.67 |
-07:41:04.2 |
HIP 77097 |
22.31 |
| 2026-08-02 12:00 |
15:44:27.78 |
-07:44:32.4 |
HIP 77097 |
18.70 |
| 2026-08-03 00:00 |
15:44:35.20 |
-07:48:01.3 |
HIP 77097 |
15.22 |
| 2026-08-03 12:00 |
15:44:42.92 |
-07:51:30.7 |
HIP 77097 |
12.04 |
| 2026-08-04 00:00 |
15:44:50.94 |
-07:55:00.6 |
HIP 77097 |
9.52 |
| 2026-08-04 12:00 |
15:44:59.27 |
-07:58:31.1 |
HIP 77097 |
8.33 |
| 2026-08-05 00:00 |
15:45:07.90 |
-08:02:02.1 |
HIP 77097 |
9.09 |
| 2026-08-05 12:00 |
15:45:16.83 |
-08:05:33.7 |
HIP 77097 |
11.47 |
| 2026-08-06 00:00 |
15:45:26.06 |
-08:09:05.7 |
HIP 77097 |
14.73 |
| 2026-08-06 12:00 |
15:45:35.59 |
-08:12:38.2 |
HIP 77097 |
18.45 |
| 2026-08-07 00:00 |
15:45:45.42 |
-08:16:11.2 |
HIP 77097 |
22.43 |
| 2026-08-07 12:00 |
15:45:55.54 |
-08:19:44.7 |
HIP 77329 |
21.10 |
| 2026-08-08 00:00 |
15:46:05.97 |
-08:23:18.6 |
HIP 77329 |
17.60 |
| 2026-08-08 12:00 |
15:46:16.68 |
-08:26:53.0 |
HIP 77329 |
14.52 |
| 2026-08-09 00:00 |
15:46:27.70 |
-08:30:27.8 |
HIP 77329 |
12.25 |
| 2026-08-09 12:00 |
15:46:39.00 |
-08:34:03.0 |
HIP 77329 |
11.33 |
| 2026-08-10 00:00 |
15:46:50.60 |
-08:37:38.6 |
HIP 77262 |
11.41 |
| 2026-08-10 12:00 |
15:47:02.50 |
-08:41:14.6 |
HIP 77262 |
10.68 |
| 2026-08-11 00:00 |
15:47:14.68 |
-08:44:50.9 |
HIP 77262 |
11.95 |
| 2026-08-11 12:00 |
15:47:27.16 |
-08:48:27.6 |
HIP 77262 |
14.76 |
| 2026-08-12 00:00 |
15:47:39.92 |
-08:52:04.7 |
HIP 77262 |
18.45 |
| 2026-08-12 12:00 |
15:47:52.98 |
-08:55:42.1 |
HIP 77262 |
22.63 |
| 2026-08-13 00:00 |
15:48:06.32 |
-08:59:19.8 |
HIP 77262 |
27.10 |
| 2026-08-13 12:00 |
15:48:19.95 |
-09:02:57.9 |
HIP 77372 |
27.85 |
| 2026-08-14 00:00 |
15:48:33.86 |
-09:06:36.2 |
HIP 77372 |
26.13 |
| 2026-08-14 12:00 |
15:48:48.06 |
-09:10:14.8 |
HIP 77563 |
24.97 |
| 2026-08-15 00:00 |
15:49:02.54 |
-09:13:53.7 |
HIP 77563 |
19.92 |
| 2026-08-15 12:00 |
15:49:17.30 |
-09:17:32.8 |
HIP 77563 |
14.84 |
| 2026-08-16 00:00 |
15:49:32.34 |
-09:21:12.2 |
HIP 77563 |
9.79 |
| 2026-08-16 12:00 |
15:49:47.66 |
-09:24:51.8 |
HIP 77563 |
5.00 |
| 2026-08-17 00:00 |
15:50:03.25 |
-09:28:31.6 |
HIP 77563 |
3.06 |
| 2026-08-17 12:00 |
15:50:19.13 |
-09:32:11.6 |
HIP 77563 |
7.11 |
| 2026-08-18 00:00 |
15:50:35.27 |
-09:35:51.8 |
HIP 77563 |
12.26 |
| 2026-08-18 12:00 |
15:50:51.69 |
-09:39:32.2 |
HIP 77650 |
15.58 |
| 2026-08-19 00:00 |
15:51:08.38 |
-09:43:12.7 |
HIP 77650 |
11.29 |